PRESS RELEASE

PARIS AIR SHOW, Monday, June 20, 2011

Pratt & Whitney Rocketdyne completed assembly of the first J-2X upper-stage engine for NASA's next era of human spaceflight in preparation for demonstration testing expected to begin this month at Stennis Space Center, Miss. The J-2X is a highly efficient and versatile rocket engine with characteristics to power the upper stage of a heavy-lift launch vehicle. Pratt & Whitney Rocketdyne is a United Technologies Corp. (NYSE:UTX) company.

"Pratt & Whitney Rocketdyne is proud to have assembled and brought to test NASA's first new human rated engine in 31 years," said Jim Maser, president, Pratt & Whitney Rocketdyne. "Built from a proven engine design, the J-2X is a safe and reliable solution for NASA's future heavy-lift architecture."

Fueled by liquid hydrogen and liquid oxygen, the J-2X engine will generate 294,000 pounds of thrust to propel a spacecraft into low-Earth orbit. The J-2X can start and restart in space to support of a variety of mission requirements. To view a time-lapse video of engine assembly, click here: http://tinyurl.com/3vxm25f

Pratt & Whitney Rocketdyne, a part of Pratt & Whitney, is a preferred provider of high-value propulsion, power, energy and innovative system solutions used in a wide variety of government and commercial applications, including the main engines for the space shuttle, Atlas and Delta launch vehicles, missile defense systems and advanced hypersonic engines. Pratt & Whitney Rocketdyne is headquartered in Canoga Park, Calif., and has facilities in Huntsville, Ala.; Kennedy Space Center, Fla.; Stennis Space Center, Miss; West Palm Beach, Fla.; and ARDE, Carlstadt, NJ. For more information about Pratt & Whitney Rocketdyne, go to www.prattwhitneyrocketdyne.com.

Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines, space propulsion systems and industrial gas turbines. United Technologies, based in Hartford, Conn., is a diversified company providing high technology products and services to the global aerospace and commercial building industries.

Please visit www.utcaero.com for news from Pratt & Whitney and United Technologies at the Paris Air Show 2011.